An aeroplane flying at a constant velocity releases a bomb. As the bomb drops down from the aeroplane, (neglect resistance)

 it will always be vertically below the aeroplane is flying at an angle ${45}^{°}$ of to the horizental

 it will always be vertically below the aeroplane

it will gradually fall behind the aeroplane if the aeroplane is flying horizentally

it will always be vertically below the aeroplane only if the aeroplane is flying horizentally